Substituted piperidinoalkanone oxime derivatives

ABSTRACT

NOVEL COMPOUNDS USEFUL AS ANTIHISTAMINE AGENTS, ANTIALLERGY AGENTS, AND BRONCHODILATORS ARE REPRESENTED BU THE FOLLOWING FORMULA   1-(Z-C(=N-OH)-(CH2)N-),4-R1,4-((DIPHENYL)-C(-R)-)-PIPERI   DINE   WHEREIN R REPRESENTS HYDROGEN OR HYDROXY; R1 REPRESENTS HYDROGEN; OR R AND R1 TAKEN TOGETHER FORM A SECOND BOND BETWEEN THE CARBON ATOMS BEARING R AND R1; N IS A POSITIVE WHOLE INTEGER OF FROM 1 TO 3; Z REPRESENTS THIENYL, PHENYL, OR SUBSTITUTED PHENYL WHEREIN THE SUBSTITUENTS ON THE SUBSTITUTED PHENYL MAY BE ATTACHED AT THE ORTHO, META, OR PARA POSITIONS OF THE PHENYL RING AND ARE SELECTED FROM HALOGEN, A STRAIGHT OR BRANCHED LOWER ALKYL CHAIN OF FROM 1 TO 4 CARBON ATOMS, A LOWER ALKOXY GROUP OF FROM 1 TO 4 CARBON ATOMS, A DI(LOWER)ALKYLAMINO GROUP, OR A SATURATED MONOCYCLIC HETEROCYCLIC GROUP SUCH AS PYRROLIDNO, PIPERIDINO, MORPHOLINO, OR N-(LOWER)ALKYLPIPERAZINO. PHARMACEUTICALLY ACCEPTABLE ACID ADDITION SALTS AND INDIVIDUAL GEOMETRIC ISOMERS OF COMPOUNDS OF THE ABOVE FORMULA ARE ALSO INCLUDED AS A PART OF THIS INVENTION.

United States Patent 3,829,433 SUBSTITUTED PIPERIDINOALKANONE OXIME DERIVATIVES Albert A. Carr, Cincinnati, C. Richard Kinsolving, Terrace Park, and Donald R. Meyer, Cincinnati, Ohio, assignors to Richardson-Merrell Inc., New York, N.

No Drawing. Filed Jan. 28, 1972, Ser. No. 221,822

Int. Cl. C07d 29/28 US. Cl. 260293.79 12 Claims ABSTRACT OF THE DISCLOSURE Novel compounds useful as antihistamine agents, antiallergy agents, and bronchodilators are represented by the following formula wherein R represents hydrogen or hydroxy; R represents hydrogen; or R and R taken together form a second bond between the carbon atoms bearing R and R n is a positive whole integer of from 1 to 3; Z represents thienyl, phenyl, or substituted phenyl wherein the substituents on the substituted phenyl may be attached at the ortho, meta, or para positions of the phenyl ring and are selected from halogen, a straight or branched lower alkyl chain of from 1 to 4 carbon atoms, a lower alkoxy group of from 1 to 4 carbon atoms, a di(1ower)alkylamino group, or a saturated monocyclic heterocyclic group such as pyrrolidino, piperidino, morpholino, or N-(lower)alkylpiperazino. Pharmaceutically acceptable acid addition salts and individual geometric isomers of compounds of the above formula are also included as a part of this invention.

FIELD OF INVENTION This invention relates to novel substituted-piperidinoalkanone oxime derivatives. More particularly this invention relates to 4-diphenylmethyl-, 4-(a-hydroxy-a-phenylbenzyl)-, and 4 diphenylmethylenepiperidinoalkanone oxime derivatives which are useful as antihistamines, antiallergy agents and bronchodilators and to methods of making and using the same.

SUMMARY OF INVENTION The novel substituted piperidine derivatives of this invention useful as antihistamines, antiallergy agents, and bronchodilators are represented by the formula N NOH I ll (CHzh-C-Z Formula I 3,829,433 Patented Aug. 13, 1974 wherein R represents hydrogen or hydroxy; R represents hydrogen; or R and R taken together form a second bond between the carbon atoms bearing R and R n is a positive whole integer of from 1 to 3; Z represent thienyl, phenyl or substituted phenyl wherein the substituents on the substituted phenyl are selected from an halogen atom, such as chlorine, fluorine, bromine, or iodine, a straight or branched lower alkyl chain of from 1 to 4 carbon atoms, a lower alkoxy group of from 1 to 4 carbon atoms, a di- (lower) alkylamino group, or a saturated monocyclic heterocyclic group such as pyrrolidino, piperidino, morpholino, or N-(lower)alkylpiperazino and may be attached at the ortho, meta, or para positions of the phenyl ring. Included in the scope of this invention are the pharmaceutically acceptable acid addition salts and individual geo metric isomers of the compounds of Formula I.

DETAILED DESCRIPTION OF INVENTION It can be seen from the above Formula I that compounds of this invention may be 4-diphenylmethylpiperidine derivatives as represented by the following Formula II, 4 (a hydroxy a phenylbenzyl)piperidine derivatives as represented by the following Formula III, or 4 diphenylmethylenepiperidine derivatives as represented by the following Formula IV.

N NOH ll (6H2) nC-Z Formula II N NOH HDEii-z Formula 111 NOH uh-(J-Z Formula IV In the above Formulas II, III and IV, n and Z have the same meanings as defined hereinbefore.

The term lower alkyl as used in describing the compounds of this invention is taken to mean a straight or branched alkyl chain of from 1 to 4 carbon atoms. As examples of lower alkyl groups that may be present in the compounds of Formulas I to IV as a straight or branched lower alkyl substituent, or in the di(lower) alkylamine substituent, or in the N-(lower)alkylpiperazine substituent on Z when Z represents a substituted phenyl there may be mentioned, methyl, ethyl, n-propyl, n-butyl, isopropyl, isobutyl and tert-butyl.

N NOH Formula V In the above Formula V, R represents hydroxy, and R represents hydrogen, or R and R taken together form a second bond between the carbon atoms bearing R and R n is a positive whole integer of from 1 to 3; and Z represents thienyl, phenyl, or substituted phenyl wherein the substituents on the substituted phenyl may be attached at the ortho, meta, or para positions of the phenyl ring and are selected from a halogen atom, such as, chlorine, fluorine, or bromine, a straight or branched lower alkyl chain of from 1 to 4 carbon atoms, a lower alkoxy group of from 1 to 4 carbon atoms, a di(lower) alkylamino group, or a saturated monocyclic heterocyclic group such as pyrrolidino, piperidino, morpholino, or N- (lower) alkylpiperazino.

The more preferred compounds of this invention are those of the above general Formula V wherein n is equal to 3.

This invention also includes the pharmaceutically acceptable acid addition salts of the compounds of the hereinbefore set forth formulas, geometric isomers and salts thereof. Pharmaceutically acceptable acid addition salts of the compounds of this invention are those of any suitable inorganic or organic acid. Suitable inorganic acids are, for example, hydrochloric, hydrobromic, sulphuric, phosphoric acids and the like. Suitable organic acids include carboxylic acids such as, for example, acetic, propionic, glycolic, lactic, pyruvic, malonic, succinic, fumaric, malic, tartaric, citric, ascorbic, maleic, hydroxymaleic, and dihydroxymaleic, benzoic, phenylacetic, 4-aminobenzoic, 4-hydroxybenzoic, anthranilic, cinnamic, salicyclic, 4-aminosalicylic, Z-phenoxybenzoic, 2 acetoxybenzoic, mandelic acid and the like, sulfonic acids such as, for example, methanesulfonic, ethanesulfonic, B-hydroxyethanesulfonic acid, and the like.

As examples of compounds illustrative of this invention there may be mentioned, for example:

4'-ethyl-3- [4- qt-hydroxy-a-phenylbenzyl piperidino] propiophenone oxime,

4-diisoproplyamino-4- (a-hydroxy-u phenylbenzyl) piperidino]butyrophenone oxime,

4-isopropyl-4- [4- a-hydroxy-a-phenylbenzyl) -piperidino] butyrophenone oxime,

4-tert-butyl-4- [4- a-hydroxy-a-phenylb enzyl) piperidino] butyrophenone oxime,

4- (4-diphenylmethylenepiperidino -4'-methoxybutyrophenone oxime,

and the like.

The novel compounds of this invention are useful as antihistamines, antiallergy agents and bronchodilators and may be administered alone or with suitable pharmaceutical carriers, and can be in solid or liquid form such as, for example, tablets, capsules, powders, solutions, suspensions, or emulsions.

The compounds of this invention can be administered orally, parenterally, for example, subcutaneously, intravenously, intramuscularly, intraperitoneally, by intranasal instillation or by application to mucous membranes such as that of the nose, throat, and bronchial tubes, for example, in an aersol spray containing small particles of a compound of this invention in a spray or dry powder form.

The quantity of novel compound administered will vary. Depending on the patient and the mode of administration, the quantity of novel compound administered may vary over a wide range to provide in a unit dosage of from about 0.01 to 20 milligrams per kilogram of body weight of the patient per dose to achieve the desired effect. For example the desired antihistamine, antiallergy and bronchodilator effects can be obtained by consumption of a unit dosage form such as, for example, a tablet containing 1 to 50 milligrams of a novel compound of this invention taken 1 to 4 times daily.

The solid unit dosage forms can be of the conventional type. Thus, the solid form can be a capsule which can be of the ordinary gelatin type containing a novel compound of this invention and a carrier, for example, lubricant and inert fillers such as 'lactose, sucrose, corn starch, and the like. In another embodiment, the novel compounds are tabletted with conventional tablet bases such as lactose, sucrose, corn starch, and the like in combination with binders such as acacia, corn starch or gelatin, disintegrating agents such as corn starch, potato starch, or alginic acid, and a lubricant such as stearic acid, or magnesium stearate.

The novel compounds may also be administered as injectable dosages by solution or suspension of the compounds in a physiologically acceptable diluent with a pharmaceutical carrier which can be a sterile liquid such as water and oils, with or without the addition of a surfactant and other pharmaceutically acceptable adjuvants. Illustrative of oils there can be mentioned those of petroleum, animal, vegetable or synthetic origin, for example, peanut oil, soybean oil, mineral oil, and the like. In general, water, saline, aqueous dextrose, and related sugar solutions, and glycols such as propylene glycol or polyethylene glycol are preferred liquid carriers, particularly for injectable solutions.

For use as aerosols the novel compounds in solution or suspension may be packaged in a pressurized aerosol container together with a gaseous or liquefied propellant, for example, dichlorodifluoromethane, dichlorodi fluoromethane with dichlorodifluoroethane, carbon dioxide, nitrogen, propane, etc. with the usual adjuvants such as co-solvents, and wetting agents, as may be necessary or desirable. The compounds may also be administered in a non-pressurized form such as in a nebulizer or atomizer.

To illustrate the utility of the compounds of this invention the following tabulation indicates the amount of certain representative compounds of this invention required to reduce by 50% Wheals induced by intradermal injections of 17 of histamine into guinea pigs. Each compound was orally administered one hour prior to the histamine injection.

Compound The minimal amounts of the compounds of Examples 1 and 3 required to prevent aerosol antigen induced bronchial spasms and death in the guinea pig are each 2.0 milligrams per kilogram of body weight orally. Additionally histamine induced muscular contractions in isolated guinea pig ileum were blocked by a 2x10 M concentration of the compound of Example 3.

The example numbers of the above compounds correspond to the example numbers of the examples used to illustrate the compounds of the invention.

The compounds of this invention may be prepared by the addition of hydroxylamine salt to the corresponding aryl substituted-piperidinoalkyl ketone as illustrated by the following N O N NOH In the above reaction R, R n and Z have the meanings defined hereinbefore in Formula I, and NH OH-X represents an acid addition salt for example a hydrochloride salt or a sulfate salt of hydroxylamine.

This reaction may be carried out in lower alcoholic solvents or water, or a combination of a lower alcoholic solvent and water in the presence of a mineral base such as sodium hydroxide, potassium hydroxide, sodium acetate, and the like, or an organic base such as pyridine. The reaction time varies from about 1 to 8 hours, and the reaction temperature varies up to 100 C. Depending on the amount of base used, the strength of the base used and/ or the method employed to isolate the product as represented by Formula I, the product is obtained as the free base or the acid addition salt as is exemplified in the specific examples.

The aryl substituted-piperidinoalkyl ketone derivatives as represented by compound 1 may be obtained by a general alkylation reaction of an appropriately substituted piperidine derivative with an w-haloalkyl aryl ketone derivative in alcohol, ketone or hydrocarbon solvents in the presence of a base as disclosed in copending application Ser. No. 221,823 (attorney Docket No. 697-M) filed concurrently herewith and incorporated herein by reference thereto.

The following specific examplesare illustrative of the invention.

EXAMPLE 1 4'-Fluoro-4- [4- a-hydroxy-a-phenylbenzyl pip eridino] butyrophenone oxime hydrochloride A mixture of 15.1 g. (0.035 mole) of 4'-fluoro-4[4- (ct-hydroxy a phenylbenzyl)piperidino]butyrophenone,

and 15 g. (0.216 mole) of hydroxylamine hydrochloride in 150 ml. of pyridine was heated on a steam bath for 1% hours. The solvent was removed under vacuum, and 150 ml. of water and 200 ml. of methanol were added to the residue. The solution was concentrated to 200 ml. The precipitate obtained upon cooling was recrystallized from ethanol to give the title compound, M.P. -150 C.

EXAMPLE 2 4'-Bromo-4- [4- a-hydroxy-a-phenylbenzyl) piperidino] butyrophenone oxime hydrochloride To 25 g. of hydroxylamine hydrochloride dissolved in ml. of water was added 10 g. (0.02 mole) of 4- bromo 4 [4 (a-hydroxy-a-phenylbenzyl)piperidino] butyrophenone hydrochloride, 100 ml. of 10% NaOH solution, and 1100 ml. of ethanol. The mixture was heated on a steam bath for 1 hour after which the solvent was removed under vacuum. The remaining residue was re crystallized from isopropyl alcohol and dried to give the desired product, M.P. 2l7-219 C.

EXAMPLE 3 4'tert-Butyl-4- [4- a-hydroxym-phenylbenzyl) piperidino]-butyrophenone oxime hydrochloride A mixture of 15 g. (0.03 mole) of 4'-tert-butyl-4- [4-(ahydroxy a phenylbenzyl)piperidino]butyrophenone hydrochloride, and 15 g. of hydroxylamine hydrochloride in 120 ml. of pyridine was heated on a steam bath for 4 /2 hours. The pyridine was removed at reduced pressure, and the remaining residue was dissolved in a minimal amount of methanol and added to excess iced 10% E01. A solid formed which was filtered and washed with water, and recrystallized from isopropyl alcohol to give the desired product, M.P. -172 C.

EXAMPLE 4 4'-tert-Butyl-4- [4- a-hydroxyu-phenylbenzyl) piperidino1-butyrophenone oxime A mixture of 15 g. (0.03 mole) of 4'-tert-butyl-4- [4- (oz hydroxy 0c phenylbenzyl)piperidino]butyrophenone hydrochloride and 15 g. of hydroxylamine hydrochloride in 120 ml. of pyridine was stirred on a steam bath for 4 hours then cooled to room temperature. The pyridine was removed at reduced pressure on a steam bath, and the residue was triturated with a dilute sodium hydroxide solution and extracted with chloroform. The chloroform extract was water washed, dried over anhydrous magnesium sulfate, filtered and concentrated to a residue which was triturated with hexane. The resulting solid was filtered off and recrystallized from ethanol to give the desired product, M.P. 211-213 C.

EXAMPLE 5 By the procedure of Example 1 only substituting for 4' fluoro 4 [4 (a hydroxy 0c phenylbenzyl) piperidino]butyrophenone, an appropriate amount of 4'- ethyl 3 [4 diphenylmethylene)piperidino]propriophenone or 4' fluoro 2 [4 (diphenylmethyl)piperidinoacetophenone the following compounds are obtaine 4-ethyl-3 (4-diphenylmethylenepiperidino propiophenone oxime hydrochloride.

4 '-fluoro-2- 4-diphenylmethylpiperidino) acetophenone oxime hydrochloride.

Similarly, by the procedure of Example 4 only substituting for 4' tert butyl 4 [4 (a hydroxy aphenylbenzyl)piperidino]butyrophenone hydrochloride an appropriate amount of one of the starting materials listed in the following Table I, the respective products listed in Table I are obtained.

TABLE I Ex. N 0. Starting material Product 6 4-[4-(a-hydroxy-a-phenyl- 4-[4-(a-hydroxy-a-phenyL benzyl)piperidino]butyrobenzyl)piperidino]butyrophenone hydrochloride, phenone oxime.

M.P. 193.5-195 C.

7 4-[4-(a-hydroxy-a-phenyl- 4-[4-(a-hydroxy-abenzyl)piperidino1-1- phenylbenzyDpiperi- (2-thienyD-I-butanono dino]-1-(2-thienyl)- hydrochloride, M.P. l-butanone oxime. 192.5-193.5 C.

8 4-[4-(a-hydroxy-a-phenyl- 4-[4-(a-hydroxy-abenzyl)piperidino]-4- phenylbenzyDprpenmethylbutyrophenone d1no]4-mel ;hylbutyrohydrochloride, M.P. phenone oxime. 236-237 C.

9 4-[4-(a-hydroxy-a-phenyl- 4-[4-(a-hydroxy-a: benzyl)piperidino]-4- phenylbenzyl) p 1per1- benzyl)piperidino]4- dino]4-pipendmopiperidinobutyrophenone, butyrophenone oxime. M.P. 137.5-139 O.

10 4'-iiuoro-2-[4-(a-hydroxy- 4'-fl110l0-2-[4-(ahya-phonylbenzyDpiperdroxy-e -phenylbenzybidinol-acetophenone plpendmolacetophehydrochloride M.P. none oxime. 171-174 C.

11 4'-fluoro-3-[4-(a-hydroxy- 4'-fluoro-3-[4-(a-hya-phenylbonzyDpiperdroxy-o -phenylbcnzybidino]-propiophenone, p1pend1no1prop1ophe- M.P. 250 0. none oxime.

12 4-(4-diphenyhnethylpiperi- 4-(4-diphenylmethyldino)butyrophenone p1pend1 no)butyrophehydrochloride M.P. none oxime. 163.5164.5 C.

13 4-fiuoro-4-(4dipheny1- 4'-fiuoro-4-(4- diphe nmethylpiperidino)butyroylmethylp1per1dino)- phenone hydrochloride butyrophenone oxime. M.P. 194195.5 C.

14 4'-fiuoro-4-(4-diphenyl- 4-fiuoro-4-(4-diphen methylenepiperidino)- ylmethylenepipenbutyrophenone hydrodino)butyrophenone chloride, M.P. 190-191 C. oxime.

15- 1 4-(4-diphenylrnethylene- 4-(4-d1phenylmethylpiperidino)-1-(2-thienyl)- enep1per1dmo)-1-(2- l-butanone hydrotluenyD-l-butanone chloride, M.P. oxime. l32.5l34.5 C.

16 4-(4-diphenylmethylene- 4-(4-d1phenylmethylpiperidino)butyropheenep1pendino)butyronone hydrochloride, phenone oxime; M.P.160161.5 0.

17 4'-bromo-4-(4-diphenyl- 4-broruo-4-(4-d1phenmethylenepiperidino)- ylmethylenepipenbutyrophenone hydrod1no)butyrophenone chloride, M.P. 228230 C. oxime.

18 4-te1t-butyl-4-(4 di- 4 r -butyl-4-(4- phenylmethylenepiperid1 phe nylmethylenedino)hutyrophenone p1per1d1no)putyrohydrochloride, M.P. phcnone oxime. 223.5225.5 0.

EXAMPLE 19 An illustrative composition for hard gelatin capsules is as follows:

(a) 4' tert butyl 4 [4 (c hydroxy ocphenylbenzyl)piperidino]butyrophenone ox1me hydrochloride 10 (b) Talc (c) Lactose 100 The formulation is prepared by passing the dry powders of (a) and (b) through a fine mesh screen and mixing them well. The powder is then filled into hard gelatin capsules at a net fill of 115 mg. per capsule.

EXAMPLE 20 An illustrative composition for tablet is as follows:

The granulation obtained upon mixing the lactose with the compound (a) and part of the starch and granulated with starch paste is dried, screened, and mixed with the magnesium stearate. The mixture is compressed into tablets weighing 110 mg. each.

8 EXAMPLE 21 An illustrative composition for an aerosol solution is the following:

Weight percent (a) 4 [4 (a hydroxy or phenylbenzyl)piperidino] 4 dimethylaminobutyrophenone oxime hydrochloride 5.0 (b) Ethanol 35.0 (c) Dichlorodifluoromethane 60.0

The materials (a), (b) and (c) are packaged in 15 ml. stainless steel containers equipped with a metering valve designed to meter 0.2 grams per close, an equivalent of 10 mg. of novel compound (a).

EXAMPLE 22 An illustrative composition for aerosol suspension is the following:

Weight percent (a) 4' Fluoro 4 [4 (a hydroxy oz phenylbenzyl)piperidino]butyrophenone oxime hydrochloride (particle size l0,u.) 20.0 (b) Sorbitan trioleate 0.5 (c) Dichlorodifluoromethane 39.75 (d) Dichlorodifluoroethane 39.75

The materials (a)(d) are packaged in 15 m1. stainless steel containers equipped with a metering valve designed to meter 50 mg. per close, an equivalent of 10 mg. of novel compound (a).

EXAMPLE 23 An illustrative composition for an injectable suspension is the following 1 ml. ampnl for an intramuscular injection.

Weight percent (a) 4-(4 diphenylmethylenepiperidino) 4 dimethylaminobutyrophenone oxime hydrochloride (particle size l0p.) 1.0 (b) Polyvinylpyrrolidone (M.W. 25,000) 0.5 (c) Lecithin 0.25 ((1) Water for injection to make 100.0

The materials (a)(d) are mixed, homogenized, and filled into 1 ml. ampuls which are sealed and autoclaved 20 minutes at 121 C. Each ampul contains 10 mg. per ml. of novel compound (a).

EXAMPLE 24 4'-Dimethylamino-4-[4-(a-hydroxy-u-phenylbenzyl) piperidino] butyrophenone oxime EXAMPLE 25 4- 4-Diphenylmethylenepiperidino -4'-methoxybutyrophenone oxime By the procedure of Example 2, only substituting for 4'-bromo 4 [4-(u-hydroxy-a-phenylbenzyl)piperidino] butyrophenone hydrochloride an appropriate amount of 4-(4-diphenylmethylenepiperidino) 4 methoxybutyrophenone hydrochloride and recrystallizing from benzenehexane the desired product was obtained, isolated as the free base, M.P. 8898 C.

9 EXAMPLE 26 4'-Fluoro-2-[4-(u-hydroxy-a-phenylbenzyl)piperidinolacetophenone o-xirne A mixture of 8.0 g. (0.018 mole) of 4'-fiuoro-2-[4-(ahydroxy-a-phenylbenzyl)piperidino] acetophenone, 70 ml. ethanol and 70 ml. of pyridine was treated with 2.5 g. (0.036 mole) of hydroxylamine hydrochloride, in 20 ml. of ethanol and refluxed for 3 hours. The reaction mixture was cooled to room temperature, poured into ice and water, diluted to about 1750 ml. with water, and allowed to stand overnight. An oil formed which was heated with Water after removal of the supernatant. The residual oil was dissolved in methylene chloride, dried over sodium sulfate, filtered, and concentrated to an oil. The residual oil was refluxed in 200 ml. of hexane to which was gradually added about 75 ml. of benzene after which the supernatant was decanted and allowed to stand overnight. A residue formed which was treated with hexane and benzene as described above. The solution was filtered and upon standing the desired product precipitated, M.P. 157-161 C.

What is claimed is:

1. A compound selected from a base of the formula Lin N NOH ((31%) r-PP-Z wherein R is selected from the group consisting of hydrogen or hydroxy. R is hydrogen. or R and R taken together form a second bond between the carbon atoms bearing R and R n is a positive whole integer of from 1 to 3; and Z is selected from the group consisting of thienyl, phenyl, substituted phenyl wherein the substituents on the substituted phenyl may be attached at the ortho, meta, or para positions of the substituted phenyl ring and are selected from the group consisting of an halogen atom, a straight or branched lower alkyl chain of from 1 to 4 carbon atoms, a lower alkoxy group of from 1 to 4 carbon atoms, a di(lower) alkylamino group, or a saturated monocyclic heterocyclic ring selected from the group consisting of pyrrolidino, piperidino, morpholino, and N-(lower)alkylpiperazino, or pharmaceutically acceptable acid addition salts thereof.

2.. A compound of Claim 1 wherein each of R and R is hydrogen.

3. A compound of Claim 1 wherein R and R taken together form a second bond between the carbon atoms bearing R and R 4. A compound of Claim 3 wherein n is equal to 3.

5. A compound of Claim 4 which is 4-[4-(diphenylmethylene)piperidino]-4'-methoxybutyrophenone oxime or a pharmaceutically acceptable acid addition salt thereof.

6. A compound of Claim 1 wherein R is hydroxy and R is hydrogen.

7. A compound of Claim 6 which is 4'fl1lOI'02-[4-(ochydroxy-a-phenylbenzyl piperidino] acetophenone oxime, or a pharmaceutically acceptable acid addition salt thereof.

8. A compound of Claim 6 wherein n is equal to 3.

9. A compound of Claim 8 which is 4'-flUOIO-4-[4-(ahydroxy-a-phenylbenzyl) piperidino]butyrophenone oxime or a pharmaceutically acceptable acid addition salt thereof.

10. A compound of Claim 8 which is 4-bromo-4-[4- (a-hydroxy a phenylbenzyDpiperidino]butyrophenone oxime or a pharmaceutically acceptable acid addition salt thereof.

11. A compound of Claim 8 which is 4'-tert-butyl-4- [4-(a-hydroxy a phenylbenzyDpiperidino]butyrophenone oxime or a pharmaceutically acceptable acid addition salt thereof.

12. A compound of Claim 8 which is 4-dimethylamino-4-[4-(a hydroxy a phenylbenzyl)piperidino] butyrophenone oxime or a pharmaceutically acceptable acid addiiton salt thereof.

References Cited UNITED STATES PATENTS 3,310,566 3/1967 Freed et al. 260293.8 3,122,555 2/1964 Janssen 260293.68 3,158,609 11/1964 Hamilton et al. 260293.79 2,739,968 3/1956 Sperber 260293.8

S. D. WINTERS, Assistant Examiner U.S. Cl. X.R.

260293.64, 293.68, 293.71, 293.78, 247.5 R, 268 PH, 240 K, 293.8; 424248, 250, 267

UNITED STATES PATENT AND TRADEMARK OFFICE CERTIFICATE OF CORRECTIQN PATENT NO. 3,829,435 DATED August 15, 1974 INVENTOR(S) Albert A Carr, C Richard Ki nsolvi ng,

Donald R Meyer v It IS certified that error appears in the above-identified patent and that sard Letters Patent are hereby corrected as shown below:

Column 2, structure IV should read H (CH -c -z I Formula lV Formula lV Column l, line 5, "4'-diisopropylaminol-Hq" should read t'- diisopropylamlno- -l-[ l-(ofl'. Column 7, Example 9, "benzyl)piperidlnoll' benzyl)plperidlno]- l'" should read "benzyl)plperidino]- l'-"; Example 18 (product) ve -butyl should read P-tert-butyl". Column 9, l ine 12, "an oi l formed which was heated should read an oil formed which was washed".

Signed and Sealed this twentieth D f January 1 9 76 [SEAL] Attest:

RUTH C. MASON C. MARSHALL DANN Arresting Officer Commissioner nj'larents and Trademarks 

